Re: PC keyboard for the IIe?

[david@uow.edu.au (David Wilson)]

"ikanja@yahoo.it" <ikanjaTOGLIMI@yahoo.it> writes:
>Is it possible to hack a PC AT keyboard on a IIe? If it is, is there any
>place where I could find detailed informations on doing that? I don't have
>much hardware hacking practice(actually I don't have any at all :)

That was one of the items on my suggestions for Hardware Projects.
The ][/][+ is actually an easier one than the //e as the former has a
separate keyboard with encoder while the //e has a dumb keyboard with
the encoder on the motherboard.

My design would be a daughter board which would plug into the keyboard
encoder and keyboard ROM sockets on the mother board. Those chips would
be plugged into the daughter board along with a PIC chip programmed to
decode the PC/AT or PS/2 keyboard byte stream. This would allow the use
of both keyboards. Quick ASCII diagram:

+-------+	+-------+	+-------+
| KBD   |	| PIC	|	| KBD	|
|encoder|-------|	|-------| EPROM |--- motherboard
|       |	|	|	|	|
+-------+	+-------+	+-------+
		    |
		    |
		PC keyboard

OR

+-------+	+-------+	+-------+
| KBD   |	| KBD	|	| PIC	|
|encoder|-------| EPROM	|-------|	|--- motherboard
|       |	|	|	|	|
+-------+	+-------+	+-------+
				    |
				    |
				PC keyboard
--
David Wilson  School of IT & CS, Uni of Wollongong, Australia